no i havent reworked anything yet. the only thing i did was to add 0.47u bypass capacitors to all electrolytic caps that pass signal,added base collector capacitor to first transistors,added rail bypass capacitors and 100ohm resistor at output. the writer used 25V supply rail and a boost cut of +-18db. i will have to recalculate values for +-10db boost/cut and maybe i use 30V for supply rail.

Mooly , i also made 2 pcb layouts for 2 band tone control using opamps this time. both pcbs include input filter,but the main difference is that the one pcb includes fets for class A biasing of opamps and the other one not. which version do you think is better to etch?